:root {
  --bg: #101114;
  --surface: #17191f;
  --surface-raised: #20232b;
  --line: #313640;
  --text: #f4f1ea;
  --muted: #aaa397;
  --accent: #ff7f00;
  --accent-strong: #e66f00;
  --danger: #ff6f61;
  --success: #72d39b;
  --warning: #ffd27a;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(255, 127, 0, 0.14), transparent 34rem),
    var(--bg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}

.app-shell {
  width: min(100%, 560px);
  margin: 0 auto;
  padding: 1.25rem 1rem 2.5rem;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0 1.25rem;
}

.app-kicker {
  margin: 0 0 0.25rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: 1.75rem;
  line-height: 1.1;
  font-weight: 800;
}

h2 {
  margin-bottom: 0;
  font-size: 1rem;
  line-height: 1.2;
}

.panel,
.submission-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(23, 25, 31, 0.94);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.26);
}

.panel {
  padding: 1rem;
}

.field-group {
  display: grid;
  gap: 0.5rem;
  margin-bottom: 0.9rem;
}

label {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 650;
}

.form-control {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--text);
  background: #0d0e12;
  font: inherit;
}

textarea.form-control {
  min-height: 15rem;
  padding: 0.9rem;
  resize: vertical;
}

input.form-control {
  height: 3rem;
  padding: 0 0.85rem;
}

.form-control:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 0.2rem rgba(255, 127, 0, 0.18);
}

.primary-button,
.secondary-button,
.ghost-button,
.icon-button {
  min-height: 2.75rem;
  border-radius: var(--radius);
  font-weight: 800;
  line-height: 1;
}

.primary-button,
.secondary-button,
.ghost-button {
  border: 1px solid transparent;
  padding: 0.8rem 1rem;
}

.primary-button {
  width: 100%;
  color: #17120a;
  background: linear-gradient(180deg, var(--accent), var(--accent-strong));
}

.secondary-button {
  color: #17120a;
  background: var(--accent);
}

.ghost-button {
  color: var(--danger);
  border-color: rgba(255, 111, 97, 0.35);
  background: transparent;
}

.icon-button {
  display: grid;
  width: 2.75rem;
  place-items: center;
  border: 1px solid var(--line);
  color: var(--text);
  background: var(--surface);
}

.history-section {
  margin-top: 1.1rem;
}

.section-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
  color: var(--muted);
}

.history-list {
  display: grid;
  gap: 0.75rem;
}

.submission-item {
  display: grid;
  gap: 0.75rem;
  padding: 0.9rem;
}

.submission-item time {
  color: var(--accent);
  font-size: 0.86rem;
  font-weight: 750;
}

.submission-item pre {
  max-height: 12rem;
  margin: 0;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text);
  font: 0.95rem/1.45 ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
}

.submission-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
}

.submission-actions form,
.submission-actions button {
  width: 100%;
}

.empty-state,
.form-error,
.flash {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.8rem;
  background: var(--surface);
}

.empty-state {
  color: var(--muted);
}

.form-error {
  margin-bottom: 0.9rem;
  color: var(--danger);
  border-color: rgba(255, 111, 97, 0.35);
}

.flash-stack {
  display: grid;
  gap: 0.5rem;
  margin-bottom: 0.8rem;
}

.flash-success {
  color: var(--success);
  border-color: rgba(114, 211, 155, 0.35);
}

.flash-warning {
  color: var(--warning);
  border-color: rgba(255, 210, 122, 0.35);
}

.login-panel {
  margin-top: 1rem;
}

@media (min-width: 520px) {
  .app-shell {
    padding-top: 2rem;
  }
}